<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程详情 开始 -->
    <section class="container">
      <section class="path-wrap txtOf hLh30">
        <a href="#" title class="c-999 fsize14">首页</a>
        \
        <a href="#" title class="c-999 fsize14">课程列表</a>
        \
        <span class="c-333 fsize14">Java精品课程</span>
      </section>
      <div>
        <article class="c-v-pic-wrap" style="height: 357px;">
          <section class="p-h-video-box" id="videoPlay">
            <img height="357px;" width="100%;" :src="courseInfo.cover" :alt="courseInfo.title" class="dis c-v-pic">
          </section>
        </article>
        <aside class="c-attr-wrap">
          <section class="ml20 mr15">
            <h2 class="hLh30 txtOf mt15">
              <span class="c-fff fsize24">{{courseInfo.title}}</span>
            </h2>
            <section class="c-attr-jg">
              <span class="c-fff">价格：</span>
              <b class="c-yellow" style="font-size:24px;">￥{{courseInfo.price}}</b>
            </section>
            <section class="c-attr-mt c-attr-undis">
              <span class="c-fff fsize14">主讲： {{courseInfo.teacherName}}&nbsp;&nbsp;&nbsp;</span>
            </section>
            <section class="c-attr-mt of">
              <span class="ml10 vam">
                <em class="icon18 scIcon"></em>
                <a class="c-fff vam" title="收藏" href="#" >收藏</a>
              </span>
            </section>
            <section class="c-attr-mt" v-if="buyCourse === true || Number(courseInfo.price) === 0">
              <a href="#" title="立即观看" class="comm-btn c-btn-3">立即观看</a>
            </section>
            <section class="c-attr-mt" v-if="buyCourse === false && Number(courseInfo.price) != 0">
              <a href="#" title="立即购买" class="comm-btn c-btn-3" @click="createOrder()">立即购买</a>
            </section>
          </section>
        </aside>
        <aside class="thr-attr-box">
          <ol  class="thr-attr-ol">
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">购买数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{courseInfo.buyCount}}</h6>
              </aside>
            </li>
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">课时数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{courseInfo.lessonNum}}</h6>
              </aside>
            </li>
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">浏览数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{courseInfo.viewCount}}</h6>
              </aside>
            </li>
          </ol>
        </aside>
        <div class="clear"></div>
      </div>
      <!-- /课程封面介绍 -->
      <div class="mt20 c-infor-box">
        <article class="fl col-7">
          <section class="mr30">
            <div class="i-box">
              <div>
                <section id="c-i-tabTitle" class="c-infor-tabTitle c-tab-title">
                  <a name="c-i" class="current" title="课程详情">课程详情</a>
                </section>
              </div>
              <article class="ml10 mr10 pt20">
                <div>
                  <h6 class="c-i-content c-infor-title">
                    <span>课程介绍</span>
                  </h6>
                  <div class="course-txt-body-wrap">
                    <section class="course-txt-body">
                      <p v-html="courseInfo.description">{{courseInfo.description}}</p>
                    </section>
                  </div>
                </div>
                <!-- /课程介绍 -->
                <div class="mt50">
                  <h6 class="c-g-content c-infor-title">
                    <span>课程大纲</span>
                  </h6>
                  <section class="mt20">
                    <div class="lh-menu-wrap">
                      <menu id="lh-menu" class="lh-menu mt10 mr10">
                        <ul>
                          <!-- 文件目录 -->
                          <li class="lh-menu-stair" v-for="chapter in chapterVoList" :key="chapter.id">
                            <a href="javascript: void(0)" :title="chapter.title" class="current-1">
                              <em class="lh-menu-i-1 icon18 mr10"></em>{{chapter.title}}
                            </a>
                            <ol class="lh-menu-ol" style="display: block;">
                              <li class="lh-menu-second ml30" v-for="video in chapter.children" :key="video.id">
                                <a :href="'/player/'+video.videoSourceId" :title="video.title">
                                  <span class="fr" v-if="video.free === true">
                                    <i class="free-icon vam mr10">免费试听</i>
                                  </span>
                                  <em class="lh-menu-i-2 icon16 mr5">&nbsp;</em>{{ video.title }}
                                </a>
                              </li>
                            </ol>
                          </li>
                        </ul>
                      </menu>
                    </div>
                  </section>
                </div>

                <!-- 评论课程 开始 -->
                <div class="mt50 commentHtml"><div>
                  <h6 class="c-c-content c-infor-title" id="i-art-comment">
                    <span class="commentTitle">课程评论</span>
                  </h6>
                  <section class="lh-bj-list pr mt20 replyhtml">
                    <ul>
                      <li class="unBr">
                        <aside class="noter-pic">
                          <img width="50" height="50" class="picImg" src="~/assets/img/avatar-boy.gif">
                          </aside>
                        <div class="of">
                          <section class="n-reply-wrap">
                            <fieldset>
                              <textarea name="" v-model="comment.content" placeholder="输入您要评论的文字" id="commentContent"></textarea>
                            </fieldset>
                            <p class="of mt5 tar pl10 pr10">
                              <span class="fl "><tt class="c-red commentContentmeg" style="display: none;"></tt></span>
                              <input type="button" @click="addComment()" value="回复" class="lh-reply-btn">
                            </p>
                          </section>
                        </div>
                      </li>
                    </ul>
                  </section>
                  <section class="">
                      <section class="question-list lh-bj-list pr">
                        <ul class="pr10">
                          <li v-for="(comment,index) in data.items" v-bind:key="index">
                              <aside class="noter-pic">
                                <img width="50" height="50" class="picImg" :src="comment.avatar">
                                </aside>
                              <div class="of">
                                <span class="fl"> 
                                <font class="fsize12 c-blue"> 
                                  {{comment.nickname}}</font>
                                <font class="fsize12 c-999 ml5">评论：</font></span>
                              </div>
                              <div class="noter-txt mt5">
                                <p>{{comment.content}}</p>
                              </div>
                              <div class="of mt5">
                                <span class="fr"><font class="fsize12 c-999 ml5">{{comment.gmtCreate}}</font></span>
                              </div>
                            </li>
                          
                          </ul>
                      </section>
                    </section>
                        
                        <!-- 公共分页 开始 -->
                        <div class="paging">
                            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
                            <a
                            :class="{undisable: !data.hasPrevious}"
                            href="#"
                            title="首页"
                            @click.prevent="gotoPage(1)">首</a>
                            <a
                            :class="{undisable: !data.hasPrevious}"
                            href="#"
                            title="前一页"
                            @click.prevent="gotoPage(data.current-1)">&lt;</a>
                            <a
                            v-for="page in data.pages"
                            :key="page"
                            :class="{current: data.current == page, undisable: data.current == page}"
                            :title="'第'+page+'页'"
                            href="#"
                            @click.prevent="gotoPage(page)">{{ page }}</a>
                            <a
                            :class="{undisable: !data.hasNext}"
                            href="#"
                            title="后一页"
                            @click.prevent="gotoPage(data.current+1)">&gt;</a>
                            <a
                            :class="{undisable: !data.hasNext}"
                            href="#"
                            title="末页"
                            @click.prevent="gotoPage(data.pages)">末</a>
                            <div class="clear"/>
                        </div>
                        <!-- 公共分页 结束 -->
                      </div>
                    </div>
                  <!-- 评论课程 结束 -->
                <!-- /课程大纲 -->
              </article>
            </div>
          </section>
        </article>
        <aside class="fl col-3">
          <div class="i-box">
            <!-- 主讲讲师 开始-->
            <div>
                <section class="c-infor-tabTitle c-tab-title">
                    <a title href="javascript:void(0)">主讲讲师</a>
                </section>
                <section class="stud-act-list">
                    <ul style="height: auto;" >
                        <li>
                            <div class="u-face">
                                <a :href="'/teacher/'+courseInfo.teacherId" target="_blank">
                                    <img :src="courseInfo.avatar" width="50" height="50" alt>
                                </a>
                            </div>
                            <section class="hLh30 txtOf">
                                <a :href="'/teacher/'+courseInfo.teacherId" class="c-333 fsize16 fl" target="_blank">{{ courseInfo.teacherName }}</a>
                            </section>
                            <section class="hLh20 txtOf">
                                <span class="c-999">{{ courseInfo.intro }}</span>
                            </section>
                        </li>
                    </ul>
                </section>
            </div>
            <!-- /主讲讲师 结束 -->
          </div>
        </aside>
        <div class="clear"></div>
      </div>
    </section>
    <!-- /课程详情 结束 -->
  </div>
</template>

<script>
import cookie from 'js-cookie'
import courseApi from '@/api/course'
// 引入评论功能
import commentApi from '@/api/commonedu'
// 引入订单
import orderApi from '@/api/order'
export default {
  data(){
    return{
      id:'', // 课程id
      courseInfo:{}, //课程信息对象
      chapterVoList:[], // 章节信息对象
      // *********评论变量**********//
      data:{},
      page:1,
      limit:4,
      total:10,
      comment:{
        content:'',
        courseId:''
      },
      buyCourse:false
    }
  },
  
  created(){
    this.id = this.$route.params.id
    this.getCourseInfo()
    // 初始化评论列表
    this.initCommonent()
  },

  methods:{
    // 立即购买课程
    createOrder(){
      // 判断是否已经登录，如果未登录，则提示用户登录
      let loginkey = cookie.get('bun_token');
      if(loginkey === undefined){
        this.$message({
            type: 'error',
            message: '请先登录后再购买视频'
        })
        this.$router.push({path: '/login'})
      }else{
        orderApi.createOrder(this.id).then(res => {
          if(res.data.success){
            //订单创建成功，跳转到订单页面
            this.$router.push({ path: '/order/'+ res.data.data.orderId })
          }
        })
      }
    },

    // 根据课程id获取课程详情
    getCourseInfo(){
      courseApi.getCourseInfo(this.id).then(res => {
        this.chapterVoList = res.data.data.chapterVoList
        // console.log(this.chapterVoList)
        this.courseInfo = res.data.data.courseWebVo
        this.buyCourse = res.data.data.buyCourse
      })
    },

    // 分页查询评论
    initCommonent(){
      commentApi.getPageList(this.page, this.limit, this.courseId).then(response => {
           this.data = response.data.data
       })
    },

    // 添加评论，也相当于回复
    addComment(){
      this.comment.courseId = this.id
      this.comment.teacherId = this.courseInfo.teacherId
      commentApi.addComment(this.comment).then(response => {
          if(response.data.success){
              this.comment.content = ''
              this.initCommonent()
          }
      })
    },

    gotoPage(page){
          commentApi.getPageList(page, this.limit,this.courseId).then(response => {
              this.data = response.data.data
          })
      }

  }

};
</script>
